@article{oai:repo.qst.go.jp:00044809,
 author = {Mori, Shinichiro and Endo, Masahiro and Komatu, Syuhei and Yashiro, Tomoyasu and Kandatsu, Susumu and Baba, Masayuki and 森 慎一郎 and 遠藤 真広 and 小松 秀平 and 矢代 智康 and 神立 進 and 馬場 雅行},
 issue = {1},
 journal = {Lung Cancer},
 month = {Apr},
 note = {The concept of internal target volume is of marked importance for radiotherapy to lung tumors as respiration-induced motion is important. Individualized assessment of motion is required as tumour site may not predict the extent or pattern of tumour motion. We performed volumetric cine scanning using the 256-multi-slice CT (256MSCT) to study tumor motion during free breathing in 14 inpatients who were treated with carbon-ion radiotherapy. Motion assessment in 16 respiratory phases of the cine CT revealed most tumors to show hysteresis-like behavior. Isocenter displacement between peak exhalation and inhalation for the average of the right and left lungs were 7 mm, 7 mm and 15 mm for the upper, middle and lower lobes, respectively. Cine CT with the 256MSCT improved the evaluation of tumor displacement and overcomes some of the limitations associated with current CT methods. Volumetric cine CT data provides useful data on motion for planning in all radiation approaches for lung tumors.},
 pages = {59--67},
 title = {Four-Dimensional Measurement of Lung Tumor Displacement Using 256-Multi-Slice CT-Scanner},
 volume = {56},
 year = {2007}
}